Best method to switch CSC from at&t to Tmobile? - Samsung Galaxy Note 9 Questions & Answers

I have unlocked att note 9 running U1 firmware on tmobile. I've been told I'm missing certain bands on tmobile by doing this? I know I'm missing video calling which doesn't really matter to me but I wonder what else I'm missing?
(please advise)
What is the best method for changing CSC from at&t to Tmobile? Thanks in advance.

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Does anyone know which US variant would be best for use in Brazil? From what I can see the ATT version has band 7 LTE and the TMO version does not, and LTE bands page (below) shows that most carriers there are band 7. This would seem pretty conclusive but wanted to see if there was anything I wasn't thinking of.
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BH
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http://en.wikipedia.org/wiki/Moto_X
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SM-N920R4 US Cellular Variant

Hello all.
I would please like to ask if its possible to install a T-Mobile Note 5 rom on this phone so that i can get Nougat and Wireless calling. I read on the S7 threads its possible to switch from an AT&T phone to a T-Mobile rom. I am hopeful we can do the same for the US Cellular variant as its quite slow with updates, im still on MM albeit April 1 security update.
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No help?
AT&T and T-Mobile are both GSM carriers. US Cellular is CDMA so you would be better off trying to flash a Verizon firmware and I am not even sure you could do that.
CodeNameRedNeck said:
AT&T and T-Mobile are both GSM carriers. US Cellular is CDMA so you would be better off trying to flash a Verizon firmware and I am not even sure you could do that.
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i understand that but thats just an LTE band issue. the phone works happily on Tmobile. Its closest relative is a Sprint Note 5 but i dont want to flash Sprint firmware, i want to have Tmobile firmware on it cos im Tmobile.

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Which US provider had the best support for international version of Note 9?
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Question AIO for the 998B/DS ?

I am in the United States and I have cricket, I just purchased the dual sim 998B/DS and I am not finding any ATT or AIO CSC for the phone. I am not able to get 5G over here on this phone so far so I am hoping somehow it would help with the cricket CSC. Maybe I am wrong, Cricket used the imei and swore it would work as well as Tmobile, neither sim cards allow 5g so far.
See at >Samsung Galaxy S21 Ultra 5G<.
There are huge differences between 5G bands support for the US and international versions.
So it doesn't surprise me at all that the inter-national model doesn't work in the US broadcasters' 5G bands.
I wasn't actually trying to surprise anyone, just seeing if anyone has a solution?
The problem is not in the phone and there is no way to replace hardware that does not support the US 5G band.
I read somewhere that in some models of Chinese devices it is possible to make a programmatic change in the hidden settings of the phone using a code entered in the phone's keypad. Try it.
jhr5474 said:
I am not able to get 5G over here on this phone
Click to expand...
Click to collapse
The international Variant does not support the needed frequencies for 5G in USA - physically
There is no way to use 5G in US, without the Snapdragon Variant
Thanks

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